I need to have a speed input for my Merc Monitor from my Helix 10 DI/SI Mega Chirp.

I had this from my old 1198c and after wiring it to the Helix I am not getting the speed on my merc Monitor. The lead that comes from the Y cable has a red, Green wires and an unshielded wire. I know you dont use the Red wire... but need to know if the connection for Helix is the same as the old 1198.I can find any documentation on connecting Helix NMEA 0183 to a Merc Monitor. I do have NMEA 0183 output turned on in the Helix settings.Thanks in advance for any assistance you can provide

I am having an issue as well with nmea. I had my 997 connected to my radio which sends the GPS coordinates to my radio. When I got my Helix 10 I reconnected the same way to my Helix and enabled NMEA output but the radio is not receiving the coordinates